Z6_GHK6HJC0OOBS30Q8BLJU6V20P2

Error:

Javascript is disabled in this browser. This page requires Javascript. Modify your browser's settings to allow Javascript to execute. See your browser's documentation for specific instructions.

Z7_OGG81JK031GEB066DJSBTV0074

Warning

Q: How do I identify whether I have a Gen B or Gen C pump?

Use the pump-identification images at the top of the technical center. The Gen B and Gen C pumps have visibly different housings and connection arrangements.

Invalid configuration found. Contact the administrator.

Z7_GHK6HJC0OOBS30Q8BLJU6V2054

0 Items

Z7_GHK6HJC0OOBS30Q8BLJU6V2056

Z7_GHK6HJC0OOBS30Q8BLJU6V20L2

Mercury Verado Power Steering Technical Center

July 13, 2026

Pro Marine USA Technical Center

Mercury Verado Power Steering Technical Center

Identify Gen A/B and Gen C systems, trace hydraulic and electrical connections, choose the correct hoses and harnesses, and plan a complete Gen B-to-Gen C pump conversion.

Explore the system Jump to parts

Verado Power Steering Technical Center

Which power steering pump do you have or plan to install?

Identify your steering system, compare Gen A, Gen B and Gen C components, perform fresh installations or Gen B-to-Gen C conversions, and find every required OEM and aftermarket part in one place.

Mercury Verado Gen A and Gen B power steering pump

Gen A / Gen B Pump

Choose this path for an existing Gen A or Gen B system or when installing a Gen A/B replacement pump.

Existing Gen A or Gen B system
Gen A/B pump replacement
Current Gen A/B hose and wiring layout

Mercury Verado Gen C power steering pump

Gen C Pump

Choose this path for a new Gen C installation or when upgrading an older Gen B system to a Gen C pump.

Fresh Gen C installation
Gen B to Gen C conversion
Gen C-specific hose and power harnesses

Choose the guide that matches your situation

Customer situation	Correct guide	Main difference
Existing Gen A or Gen B system	Gen A / Gen B guide	Uses the Gen A/B pump, damper hose and original Gen A/B hose arrangement.
New Gen C installation	Fresh Gen C guide	Uses Gen C pump-to-helm ORFS hose kits, Gen C power harnesses and engine-count signal kits.
Working Gen B system being upgraded	Gen B-to-Gen C conversion	Reuses the helm, cylinder, return hose and cylinder hoses while replacing the damper with conversion hose 8M0152467.

How this page works

All three guides are included in this page from the initial load. The selector simply moves customers to the correct section; it does not load the technical content later. That means the Gen A/B guide, fresh Gen C installation guide, and Gen B-to-Gen C conversion guide remain available in the HTML for search engines and AI systems.

Gen A / Gen B power steering guideJump to guide Fresh Gen C installation guideJump to guide Gen B to Gen C conversion guideJump to guide

How are you using the Gen C pump?

Fresh Gen C Installation

Build a complete Gen C system using the Gen C pump, Gen C pump-to-helm hoses, the correct power harness and the required engine signal kit.

Gen B to Gen C Upgrade

This path will cover the adapter hose, removed damper hose, power-harness changes and reusable Gen B components.

Parts planning

Required-parts overview

Use this as a starting checklist. The interactive diagrams and detailed sections explain the exact options and when each item is required.

Gen A / Gen BPump, helm, helm-to-pump hose kit, damper hose, cylinder hoses, cylinder, signal harness, adapter, fuse and fluid.

Fresh Gen CGen C pump, Gen C pump-to-helm hose kit, power harness, signal kit, helm, cylinder hoses, cylinder and fluid.

Gen B to Gen CGen C pump, conversion hose 8M0152467, signal conversion kit 8M0199050, verified 80-amp protection and compatible APS when applicable.

Interactive system overview

Trace each connection from the exact helm port, then select any component or route part to see its purpose, available options and product links.

PM-PS-001 Revision G — Complete Gen A / Gen B system

Pressure Return Cylinder hoses Battery power Signal

P, E, L and R connections PELRT P — pressure from pumpE — non-pressure returnL and R — cylinder hose pair

8M0134736P replacement

OEM or remanufactured

＋−

Starting Battery

Single or multiple engine banks

Power connections

Single engine: battery → fuse → pump
Multiple engines: batteries → APS → fuse → pump

Signal connections

Engine → signal harness → 8M0026568 adapter → pump

Verado Engine

Engine harness connection

How to use this diagram: follow each color-coded lane from its exact connection point. Select any component card for specifications and product options.

11. Steering FluidMercury 858077

Tilt Helm8M0137451

Non-Tilt Helm8M0137449

Multiple EnginesAdd 8M0149746 APS

Component 1

Steering helm and port identification

The helm controls fluid flow between the Gen A/B pump and the steering cylinder. The rear markings should be read directly from the helm body.

P — Pressure
High-pressure fluid from the pump to the helm.

E — Return
Non-pressure return from the helm back to the pump.

L — Port cylinder
Connects to the port-side cylinder fitting.

R — Starboard cylinder
Connects to the starboard-side cylinder fitting.

T — Remaining helm port
Keep identified in the visual; installation guidance should follow the exact helm documentation.

Tilt helm — 8M0137451View product Non-tilt helm — 8M0137449View product

Related parts: helm-to-pump hose kit, helm-to-cylinder hose pair and damper hose.

Mercury Verado Gen A and Gen B steering pump

Component 2

Gen A / Gen B power steering pump

The pump supplies hydraulic assistance and connects to the helm pressure hose, low-pressure return, direct battery power and the engine signal circuit.

Replacement pump — 8M0134736PView product Recommended damper hose — 897643A01View product Mercury power steering fluid — 858077View product

Component 3

Steering cylinder, replacement and repair

The cylinder converts helm fluid movement into engine steering movement. Customers can replace the complete cylinder or service leak-related components when appropriate.

New OEM cylinder — 896500A01OEM Reman cylinder — 896500R01Reman OEM seal kit — item 2700 / 8M0045604Repair Pro Marine seal kit — 2700PRepair Cylinder-to-engine seal — 880667Seal

Required connection: matched L and R helm-to-cylinder hose pair.

Hydraulic hose selection

The system uses two different hose groups. The helm-to-pump kit does not replace the separate L and R hoses between the helm and cylinder.

Helm to pump

10 ft kit — 8M0078210View 16 ft kit — 8M0078213View

Helm to cylinder

Mercury helm to steering cylinder hose pair

Select one matched hose pair in the required routing length.

Current availability: Helm-to-cylinder hose pairs are currently special-order items.

Length	Part number	Length	Part number
2 ft	8M0167281	14 ft	8M0167290
3 ft	8M0167282	16 ft	8M0167291
4 ft	8M0167283	18 ft	8M0167292
5 ft	8M0167284	20 ft	8M0167293
6 ft	8M0167285	22 ft	8M0167294
7 ft	8M0167286	24 ft	8M0167295
8 ft	8M0167287	26 ft	8M0167296
10 ft	8M0167288	28 ft	8M0167297
12 ft	8M0167289	30 ft	8M0167298
		32 ft	8M0167299

Electrical and signal connections

A single-engine system uses direct fused pump power and the signal-harness chain. Multiple-engine installations add the Automatic Power Source.

Single engine

Starting battery
Provide direct positive and ground connections appropriate for the pump.

Inline fuse
Install the required fused protection in the direct positive feed.

Signal chain
Use the selected 10, 20 or 30 ft harness with the 8M0026568 signal drive adapter to the pump.

Multiple engines

Automatic Power Source for multiple Verado engines

Add the 8M0149746 Automatic Power Source for multiple-engine installations.

Filling and bleeding overview

The full publication version will convert Mercury’s procedure into a step-by-step illustrated workflow. The prototype reserves the section and establishes its visual style.

Do not allow the pump to run dry. Maintain the fluid level while filling and bleeding. Final installation and bleeding should follow the applicable Mercury service information for the exact system.

Fill the pump reservoir with the specified Mercury power steering fluid.

Operate the pump and slowly move the steering from lock to lock while maintaining fluid level.

Bleed each cylinder end in the direction the engine is pointing and return the fluid to the pump reservoir.

Recheck the fluid level and steering operation after the system rests.

Frequently asked questions

How do I identify whether I have a Gen B or Gen C pump?

Use the pump-identification images at the top of this technical center. The Gen B and Gen C pumps have visibly different housings and connection arrangements.

Can I install a Gen C pump on a functioning Gen B system?

Yes. Reuse the existing helm, cylinder, helm-to-cylinder hoses, non-pressure return hose and fluid. Remove the Gen B damper hose, install conversion hose 8M0152467, add signal kit 8M0199050, verify 80-amp protection and confirm APS compatibility on multiple-engine boats.

Does the Gen C pump use the Gen B damper hose?

No. The Gen B damper hose is removed during the conversion and is not used with the Gen C pump.

What replaces the Gen B damper hose?

Conversion hose 8M0152467 connects the existing Gen B pressure hose to the Gen C pump.

Can the Gen B non-pressure return hose be reused?

Yes. In the conversion path, the existing non-pressure return hose connects directly to the Gen C pump.

Can I reuse the Gen B helm and steering cylinder?

Yes, when the existing Gen B system is complete and functioning. The helm, cylinder and helm-to-cylinder hoses remain in place.

What fuse protection does the Gen C pump require?

The Gen C pump requires suitable 80-amp circuit protection. Verify the existing power setup or install the correct fused Gen C power harness.

Which APS units should be replaced for a Gen C conversion?

Replace an APS labeled for a 40-amp maximum load or part numbers 895091K01, 895091K02, 895091K03 or 8M0133815. APS 8M0149746 is compatible for the upgrade path described here.

What is included in signal kit 8M0199050?

The kit includes one 8M0026568 signal drive harness assembly and one 8M0164725 Gen C pump signal adapter.

Are Gen C pump-to-helm hose kits stocked?

The Gen C pressure and non-pressure return hose kits shown in this guide are currently special-order items.

Are the helm-to-cylinder hoses the same for Gen A/B and Gen C?

Yes. The matched L and R hose-pair options remain the same in the fresh Gen C and conversion guides.

What power steering fluid should I use?

Use Mercury power steering fluid 858077 for the Gen A/B and Gen C systems described in this guide.

Do the 10 ft and 16 ft kits include the cylinder hoses?

No. Those kits connect the helm to the Gen A/B pump. The L and R helm-to-cylinder hoses are selected separately by length.

When is the Automatic Power Source required?

Use the 8M0149746 Automatic Power Source for multiple-engine installations.

Can the steering cylinder be rebuilt?

Seal-kit options are available, along with new OEM and remanufactured complete cylinders. The correct repair depends on the failure and cylinder condition.

Where does the damper hose install?

The 897643A01 damper hose installs at the pump end of the pressure hose and is recommended for Gen A and Gen B systems.

Fresh Gen C Installation

Interactive Gen C system overview

The helm, steering cylinder, fluid and helm-to-cylinder hoses remain the same as the Gen A/B system. The Gen C pump uses Gen C pump-to-helm hoses, a selected power harness and an engine-count-specific signal kit.

Gen C Fresh-Install System

PressureReturnCylinder hosesPowerSignal

Same tilt and non-tilt options PELRT P — Gen C pressure hoseE — non-pressure returnL and R — same cylinder hoses

8M0199048

Same OEM and reman options

＋−

Starting Battery

Power source

Power connections

Battery or APS → selected Gen C power harness → pump

Signal connections

Engine → existing signal harness → engine-count-specific Gen C signal kit → pump

Verado Engine

Signal source

Fresh-install difference: Gen C uses its own ORFS pump-to-helm hose kits and does not use the Gen A/B damper hose.

Gen C Component 2

Gen C Power Steering Pump

The 8M0199048 pump is the center of the fresh Gen C installation and uses Gen C-specific pump-to-helm hoses, a selected power harness and the applicable signal kit.

Gen C pump — 8M0199048View product

Gen C pump-to-helm hose kits

Each Gen C kit includes one pressure hose and one non-pressure return hose. These kits are currently special order.

Special order: Confirm the required routing length before ordering.

Length	Part number	Length	Part number
2 ft	8M0150604	14 ft	8M0150615
3 ft	8M0150605	16 ft	8M0150616
4 ft	8M0150606	18 ft	8M0150617
5 ft	8M0150607	20 ft	8M0150618
6 ft	8M0150608	22 ft	8M0150619
7 ft	8M0150610	24 ft	8M0150620
8 ft	8M0150612	26 ft	8M0150621
10 ft	8M0150613	28 ft	8M0150622
12 ft	8M0150614	30 ft	8M0150623
		32 ft	8M0150624

Gen C power harness options

Choose the required harness length and whether the installation uses the harness version with an included fuse or a separately protected circuit.

Harness with fuse

4 ft — 8M0150103View 12 ft — 8M0150104View 24 ft — 8M0150105View

Harness without fuse

4 ft — 8M0150142View 12 ft — 8M0150143View 24 ft — 8M0150144View

Gen C signal kits by engine count

The standard 10, 20 or 30 ft signal harness remains part of the signal path. Select the Gen C connection kit that matches the number of engines.

Single engine

8M0199050 kit

Includes one 8M0026568 and one 8M0164725.

Single-engine Gen C signal kit — 8M0199050View product

Twin engine

8M0199051 kit Special order

Includes the required APS.

Triple engine

8M0199052 kit Special order

Quad engine

8M0199053 kit Special order

Gen C Component 8

Power steering fluid

The Gen C system uses the same Mercury power steering fluid as the Gen A/B system.

Mercury power steering fluid — 858077View product

Gen B to Gen C Upgrade

Upgrade a complete, functioning Gen B system to a Gen C pump

Gen B-to-Gen C Conversion Overview

Pressure conversionExisting returnExisting cylinder hosesPower checkSignal conversion

Reused from Gen B system PELRT P — remove damper, add conversion hoseE — existing return connects directlyL and R — unchanged

8M0199048

Reused from Gen B system

＋−

Existing Power Source

Verify 80-amp protection

Power and fuse check

Existing wiring may be reused only if the circuit uses 80-amp protection and is suitable for the Gen C pump

Signal conversion

Engine → existing signal harness → 8M0199050 conversion kit → Gen C pump

Verado Engine

Existing signal source

Remove the Gen B damper hose. Do not install the Gen C pump with the Gen B damper still in the pressure circuit. Install conversion hose 8M0152467 in its place.

Conversion reference

Gen B-to-Gen C parts relationship table

Existing Gen B component	Conversion action	Gen C requirement
Gen B pump	Remove	Install Gen C pump 8M0199048
Damper hose 897643A01	Remove and do not reuse	Install conversion hose 8M0152467
Non-pressure return hose	Reuse	Connect directly to the Gen C pump
Steering helm	Reuse	No change when the existing system is functional
Steering cylinder	Reuse	No change when the existing cylinder is serviceable
Helm-to-cylinder hoses	Reuse	No change
Existing signal harness	Reuse as part of the signal path	Add signal conversion kit 8M0199050
Existing power wiring	Inspect and verify	Must have suitable 80-amp protection or be replaced
Older 40-amp APS	Replace	Use compatible APS 8M0149746 when applicable
Power steering fluid	Same specification	Mercury 858077

Components that stay in place

A functioning Gen B system already has several components that remain compatible with the Gen C pump conversion.

Steering helm
Reuse existing Gen B helm

Steering cylinder
Reuse existing cylinder

Helm-to-cylinder hoses
Reuse existing L and R pair

Power steering fluid
Same Mercury 858077 fluid

Hydraulic conversion steps

Disconnect and remove the existing Gen B pump.
Retain the existing helm, cylinder, return hose and pressure hose routing.

Connect the existing non-pressure return hose directly to the Gen C pump.
No return-side adapter is required for this conversion.

Remove the Gen B damper hose from the pressure side.
The Gen B damper is not used with the Gen C pump.

Install conversion hose 8M0152467.
This replaces the removed damper hose and adapts the existing Gen B pressure hose to the Gen C pump.

Gen B-to-Gen C pressure conversion hose — 8M0152467View product

Signal conversion kit

Install the same 8M0199050 signal conversion kit used for the single-engine Gen C setup.

Kit contents:

One 8M0026568 signal drive harness assembly
One 8M0164725 Gen C pump signal adapter

Gen C signal conversion kit — 8M0199050View product

Power wiring and fuse requirements

Reuse the existing power setup only after verifying it has an 80-amp fuse or suitable 80-amp protection.

If the current protection is 60 amps, replace it with the correct 80-amp protection or install a new Gen C power harness.

Replacement harnesses with fuse

4 ft — 8M0150103View 12 ft — 8M0150104View 24 ft — 8M0150105View

What to verify

80-amp fuse or approved equivalent protection
Power wiring condition and capacity
Clean battery and ground connections
Correct routing and strain relief

Automatic Power Source check for multiple engines

Multiple-engine boats must verify that the installed APS is rated for the Gen C pump’s current demand.

Replace the APS if:

The side schematic references a 40-amp maximum load
The APS part number is 895091K01
The APS part number is 895091K02
The APS part number is 895091K03
The APS part number is 8M0133815

Compatible APS:

8M0149746

If the installed APS is 8M0149746, it is the correct unit for this upgrade path.

Automatic Power Source — 8M0149746View product

Avoid these errors

Common Verado power steering setup mistakes

Leaving the Gen B damper installed during a Gen C conversion

Remove the damper and install conversion hose 8M0152467 in its place.

Assuming the existing fuse is adequate

Verify suitable 80-amp circuit protection before operating the Gen C pump.

Using an older 40-amp APS

Inspect the APS label and part number on multiple-engine installations.

Ordering pump-to-helm hoses instead of cylinder hoses

These are two separate hose groups with different functions and part-number ranges.

Connecting the pressure route to the wrong helm port

The pressure feed connects to P; the non-pressure return connects to E.

Running the pump dry while filling or bleeding

Maintain the correct fluid level throughout the process.

Skipping signal-kit selection by engine count

Fresh Gen C installations use different kits for single, twin, triple and quad-engine applications.

Assuming every Gen B installation is ready for conversion

The conversion branch is intended for a complete, functioning Gen B system.

Diagnostic starting points

Verado power steering troubleshooting guide

These checks help narrow down common steering complaints. Final diagnosis should follow the applicable Mercury service information for the exact engine and steering configuration.

No power assist

Check battery voltage, fuse or circuit protection, power harness connections, grounds, APS compatibility and the pump signal path.

Intermittent assist

Inspect loose battery connections, harness strain, corrosion, signal connectors, APS output and low-voltage conditions.

Noisy pump

Verify fluid level, look for aerated fluid, inspect the return side for air entry and confirm the system has been bled correctly.

Steering is hard in both directions

Confirm pump operation, fluid level, hose routing and that the pressure and return circuits are connected correctly.

Steering is harder in one direction

Inspect the L and R cylinder-hose routing, cylinder condition and possible trapped air at one cylinder end.

Fluid leak at the cylinder

Inspect the complete cylinder, the available seal kits and the cylinder-to-engine seal before deciding whether to rebuild or replace.

Gen C conversion does not build assist

Confirm the Gen B damper was removed, conversion hose 8M0152467 is installed, 80-amp protection is present and signal kit 8M0199050 is connected.

Multiple-engine system loses pump power

Inspect the APS label, current rating, part number, battery feeds and 80-amp fuse or breaker arrangement.

Related parts and guides

Shop and continue learning

Gen A / Gen B replacement pump 8M0134736P Gen C power steering pump 8M0199048 Gen B-to-Gen C conversion hose 8M0152467 Gen C signal conversion kit 8M0199050 Automatic Power Source 8M0149746 Mercury power steering fluid 858077 Gen A / Gen B hose selection Gen C hose selection

Complementary Content

${loading}